Israel’s military said about 200 aircraft were involved in the initial attack on about 100 targets. Two security officials said the country’s Mossad spy agency was also able to position explosive drones inside Iran ahead of time and then activate them to target missile launchers at an Iranian base near Tehran.
Sorry I read that in a different report here: https://apnews.com/article/iran-explosions-israel-tehran-00234a06e5128a8aceb406b140297299